Remove std::move that was preventing return value optimization.

llvm-svn: 226356

llvm/lib/AsmParser/Parser.cpp

@@ -38,7 +38,7 @@ std::unique_ptr<Module> llvm::parseAssembly(MemoryBufferRef F,
   if (parseAssemblyInto(F, *M, Err))
     return nullptr;
 
-  return std::move(M);
+  return M;
 }
 
 std::unique_ptr<Module> llvm::parseAssemblyFile(StringRef Filename,

llvm/lib/Support/YAMLParser.cpp

@@ -1570,11 +1570,11 @@ std::string Node::getVerbatimTag() const {
     if (Raw.find_last_of('!') == 0) {
       Ret = Doc->getTagMap().find("!")->second;
       Ret += Raw.substr(1);
-      return std::move(Ret);
+      return Ret;
     } else if (Raw.startswith("!!")) {
       Ret = Doc->getTagMap().find("!!")->second;
       Ret += Raw.substr(2);
-      return std::move(Ret);
+      return Ret;
     } else {
       StringRef TagHandle = Raw.substr(0, Raw.find_last_of('!') + 1);
       std::map<StringRef, StringRef>::const_iterator It =
@@ -1588,7 +1588,7 @@ std::string Node::getVerbatimTag() const {
         setError(Twine("Unknown tag handle ") + TagHandle, T);
       }
       Ret += Raw.substr(Raw.find_last_of('!') + 1);
-      return std::move(Ret);
+      return Ret;
     }
   }